Multiplying Decimals
Dividing Decimals
Word Problems
Metric Conversions
Using Exponents
100
What is 5.23 x 10
52.3
100
32,000 divided by 10
3,200
100
Miss Hallman has a pumpkin that is 1/10 the size of Miss Long's pumpkin. If Miss Long's pumpkin is 45,000g, how big is Miss Hallman's pumpkin. (Use a place value chart to describe)
Miss Hallman's pumpkin is 4,500g because we had to divide by 10 to show 1/10. We went one space to the right on the place value chart.
100
3 meters to centimeters
3 x 10^3= 300 cm
100
10^4
1,000
200
What is 52.3 x 100
5,230
200
32,000 divided by 100
320
200
Mr. Fermanis says that 23.5 x 100 will give him 235. However, Mrs. McIntire says he is wrong. Do you agree? Explain
Mrs. McIntire is correct. He is wrong. He should have went to places to the left on the place value chart or moved the decimal 2 places to the right to show that the answer multiplied by 100 should be 2,350.
200
90.5 kilometers to meters
90.5 x 10^4 = 90,500m
200
10^6
1,000,000
300
What is 52.3 x 1,000
52,300
300
32,000 divided by 1,000
32
300
Batman says that 4 tenths multiplied by 100 equal 400 thousandths. Is he correct? Use a place value chart or solve mentally to explain.
4 tenths (0.4) x 100 would make each digit move 2 places to the left on the place value chart resulting in 40. You can also move the decimal two places to the left to give 40 as well. Batman was wrong because he divided instead.
300
900 centimeters to meters
900 divided by 10^3 = 9m
300
8.23 x 10^2
823
400
What is 7.67 x 100
767
400
567,000 divided by 10,000
5.67
400
Alaska has a land area of about 1,700,000km. Florida has a land area 1/10 the size of Alaska. What is the land area of Florida? Explain
I noticed that I needed to divide 1,700,000 by ten since Florida is 1/10 the size of Alaska. When doing this, I can just take off a zero to give me 170,000km.
400
3012g to kg
3012 divided by 10^3 = 3.012kg
400
45,657 divided by 10^3
45.657
500
What is 767 x 10,000
7, 670,000
500
A student used his place value chart to show a number. After the teacher instructed him to divide his number by 10, the number showed 860. Draw a picture of what the place value chart looked like at first.
8,600
500
Anthony drinks 800 ml of water each day during P.E. Rafael drinks 600 ml daily during P.E. If Anthony goes to P.E 3 days a week, and Rafael goes to P.E. 5 days a week, how many liters do the boys drink in all during P.E?
800ml x 3 = 2,400 ml _____2.4 l 600ml x 5 = 3,000 ml _____ 3.0 l 5.4 l all together!
500
A dining room table measures 1.78 m long. Express this measurement in millimeters. A. Using a place value chart and B. Explain your thinking using an equation that includes an exponent.
1.78m x 10^3=1,780 mm
500
There were 9 children at a birthday party. Each child drank one 200 ml juice box. How many liters of juice did they drink altogether? Explain your answer using an equation that includes an exponent.
9 x 200ml = 1,800 ml 1,800 divided by 10^3 = 1.8 l
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